Piezoelectric sensor and production method thereof, and display device

A piezoelectric sensor and display device technology, applied in the field of sensors, to achieve the effect of high measurement accuracy

Pending Publication Date: 2021-06-01
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The ultrasonic sensor composed of piezoelectric crystals is a reversible sensor, which can convert electrical signals into mechanical oscillations to generate ultrasonic signals, and when it receives ultrasonic signals, it can also convert ultrasonic signals into electrical signals, so ultrasonic sensors are generally Including sending and receiving types, but there are also ultrasonic sensors that can both send and receive

Method used

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  • Piezoelectric sensor and production method thereof, and display device
  • Piezoelectric sensor and production method thereof, and display device
  • Piezoelectric sensor and production method thereof, and display device

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] In recent years, with the development of smart electronic product technology and the improvement of users' requirements for the security and privacy of electronic products, biometric technology has developed rapidly, especially fingerprint recognition technology and facial recognition technology.

[0054] Among them, in the fingerprint identification technology, the ultrasonic identification technology is used to identify the fingerprint. When ultrasoni...

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Abstract

The embodiment of the invention provides a piezoelectric sensor and a production method thereof, and a display device, and relates to the technical field of sensors. The measurement precision of the piezoelectric sensor can be improved. The piezoelectric sensor comprises a plurality of piezoelectric units arranged on a substrate, and each piezoelectric unit comprises a first electrode, a piezoelectric pattern and a second electrode which are stacked; and the piezoelectric pattern is made of a piezoelectric material.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a piezoelectric sensor, a preparation method thereof, and a display device. Background technique [0002] Ultrasound is a mechanical wave with the advantages of high frequency, short wavelength, good directionality, directional propagation, and high penetration rate. Ultrasonic sensors convert ultrasonic signals into other energy signals, usually electrical signals. The main materials of ultrasonic sensors are piezoelectric crystals and nickel-iron-aluminum alloys. The ultrasonic sensor composed of piezoelectric crystals is a reversible sensor, which can convert electrical signals into mechanical oscillations to generate ultrasonic signals, and when it receives ultrasonic signals, it can also convert ultrasonic signals into electrical signals, so ultrasonic sensors are generally There are two types of sending and receiving types, but there are also ultrasonic sensors that can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/08H01L41/113H01L41/29
CPCH10N30/1071H10N30/00H10N30/302H10N30/06
Inventor 张锋刘文渠卢鑫泓崔钊吕志军董立文宋晓欣王利波孟德天
Owner BOE TECH GRP CO LTD
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